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'me Model.) 2 sheets-sheen 1.

Y, R. P.' MANLY.

FIRE PROOF SHUTTER.

N0. 281,198. Y Patentedauly 1o., 188s..

WJTNESSES: IN1/EMT 0R: Y1mmpQ/m40.tlm-iff @raw/EMM@ HMM ww@ @www N. PETERS. Phmcvulhngnph. Wmhingwm D.c.

(No Model.)

2 Sheets-Sheet 2. 3.1. MANLY.

FIRE PROOF SHUTTEB..

Patented July 10, 1883.

IVENTOR:

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UNITED y STATES' PATENT Strien.

RGBERT I). MANLY, OF PHILADELPHIA, PA., ASSIGNCR OF ONE-HALF TO THE MANDY it COOPER MANUFACTURING COMPANY, OF SAME PLACE.

FIRE-PROOF SHUTTER.

SPECIFICATION forming part of Letters Patent No. 281,198, dated July 10, 1883. Application filed January Q, 1883. (No model.)

To all whom it may concern:

Be it known that l, ROBERT P. MARLY, a citizen of the United States, and a resident of Philadelphia, Pennsylvania, have invented certain Improvements in Fire-Proof Doors,

Shutters, Sto., of which the following is a specification.

My invention relates to the construction of fire-proof doors, shutters, &c., ofwrought-iron; and my invention consists, mainly, of the peculiar combination, described hereinafter, of channel-bars with a plate or plates, whereby strong and rigid, but comparatively light, frames are produced.

- My invention also consists of other features of construction, too fully explained hereinafter to need preliminary description.

In the accompanying drawings, Figure l, Sheet l, is a perspective view (fullsize) of part of a iireproof door, shutter, or partition made according to my invention, Fig. 2, a sectional plan of Fig. 1; Fig. 3, the same as Fig. 2, showing a backing of refractory or non-conducting material combined with the frame, Fig. 4:, a modification of Fig. l.; Fig. 5, Sheet 2, a view, drawn to a reduced scale, of a door made according to my invention, part of the cover-plate being removed to show the channel-iron ribs; Fig. 6, a sectional view (half size) of the door and part of an adjoining door, and Figs. 7 and 8 detached views illustrating my invention.

It will, be well, in the first instance, to referV to the diagrams in Sheet l, which represent the main feature of my invention.

In the sectional perspective view, Fig. l, A is one of aseries of vertical channel-bars; B, one of a series of similar but transverse bars, and D a cover-plate of sheet-iron. The bars, it will be observed, are arranged back to back-that is to say, the iiat back a of each of the series of transverse bars is placed against the iiat backs of the vertical bars, and the bars, where they cross each other, are connected together and to the plate D by a bolt or rivet, E, the stem of which passes through the plate, through the dat backs of both eh annel-bars, and through a stay or ferrule, F, interposed between the vertical bar and the plate, as shown in the sec- 5o tional view, Fig. 2. rllhere may be two plates,

one on each side of the channel-bar frame; but in most cases the structure will be adopted in the manufacture of fire-proof doors, shutters, and partitions, the backing of which consists of plaster-of-paris, cement, or other nonconducting or refractory material, in which case the frame is well adapted for the secure retention of the material, as will be seen by reference to the sectional view, Fig. 3, in which x represents the non-conducting or refractory 6o material, which has been lodged, while in a plastic state, in the recesses formed by the ribs of the frames, and behind the transverse channel-bars B, which thus retain in place the materialafteritbecomes dry andhard. Where a simple iron door has to be made, without any regard to neatness of nish and without any non-conducting material, there may be a combination of crossed channel-bars placed back to back, with a plate, D', interposed between 7o the backs of the two sets of bars, as shown in Fig. 4. In wroughtiron channehbars the distribution of metal is such that although the said bars are light they have great transverse strength, and can be made cheaply; hence they 7 5 are well adapted to the construction of co1n paratively light lire-proof doors, shutters, &c. lVhen subjected to heat, however, they have a tendency to warp in one direction, and this is one of the objects of securing them together Se back to back, for the tendency of one set of barsto warp in one direction will be counteracted by the tendency of the other set to warp in the contrary direction; but the main object isv to make the most rigid and substantial strnctu re with the least amount of metal.

Fig. 5, Sheet 2, shows an entire door com posed of vertical and transverse bars of channeliron combined with a cover-plate of sheetiron.

In the construction of sliding doors I pre fer to make all four edges of two channel-bars, H H', riveted or bolted together back to back, as shown in Fig. 6, so that an internal flange, f

conducting or refractory material 5 but when this is not used as a part of the door a single channel-iron may be used. At each corner of the door, where two edges meet and are fitted toeach other, I rivet to each edge any roo I may be presented for the retention of nonsuitablel corner-piece of wrought-iron. The manner of securing the channelfbars to the edges'of the door is illustrated in Figs. 6 and 7, each end of the bar B being so cut away as to present atenon, b, which is passed through the channel-iron edge of the door and riveted or clinched. /Vhere there are two sliding doors arranged to meet, I use for one edge of one of the doors a single channel-iron bar, I, Fig. 6, and rivet to the same astrip, m, adapted to the recess formed by the channel-ironedge of the adjoining door, so that when the doors meet there will be a comparatively tight joint.

Wrought-iron"partitions may be' made in the same manner as the doors, and when a sliding door is used in connection with such a partition, the edge of the latter, against which the door has to be closed, may have a strip, m, adapted to the edge of the door. Vhen the door is backed with non-conducting or refrac- Y tory material, the latter is preferably so thick as to entirely cover the wrought-iron frame. The extent of the material beyond the frame is shown in the full-sized sectional view, Fig.

3, and is indicated by the dotted line y in Fig. 6. In order that the material may be retained on the door where it crosses the edges, I secure to the back of the frame, at and near all four edges of the door,wiregauze or wirenetting w, through the meshes of which the material, when in a plastic state, can penetrate. This will be understood by referring to Fig. 8.

' In constructing hinged doors or shutters,

each edge of the dooris composed, preferably,

of a single channel-bar, the ilanges of which projectinward. f z

I claim as my inventionl. A wrought-iron door, shutter, or partition, in-the frame of which two sets of channelbars placed back to back and crossing each other are combined with a plate or plates secured to the said bars, all substantially as set forth.

2. The combination, in a fire-proof door or partition, of a frame composed of two sets of channel-bars placed back to back, and aplate secured to said bars, with abacking, x, of nonconducting or refractory material.

3. The combination of the vertical and transverse channel-bars, placed back to back, with edging channel-bars H H and plate D.

4. In sliding doors or shutters arranged to fit together' and to be moved apart, the co1n bination of the channel-iron edge of one door with the channel-iron edge of the adjoining door, having a strip, m, substantially as described.

5. lIhe combination ofthe channel-bar frame, cover-plate, and channel-bar edges with wire.

gauze w, attached to the edge bars, substan- I tially as set forth.

In testimony whereof I have signed my name to this specification in the presence of two subscribing witnesses.

ROBI. P. MANLY.

Witnesses:

GHARLEs W. SPARHAWK, HUBERT HowsoN. 

